Molecule

VERSUS

About this game

3.011 caracteres, guardada en playStore/descripcion-larga-en.txt:

A chemistry notebook. A handful of loose atoms. A formula to solve.

MOLECULA is an atomic bonding puzzle with the look and feel of a hand-drawn lab notebook. Every practical hands you a few atoms and a real compound to build: drag, connect and fill every valence until the formula adds up. No atoms left over. No extra bonds.

You start with H₂. You finish with caffeine.

— HOW TO PLAY —

Every atom has its own bonds to give: hydrogen one, oxygen two, nitrogen three, carbon four. Drag one atom onto another to bond them and build the exact structure of the compound.

It sounds easy with water. Wait until you reach aspirin.

Each practical gives you a move budget: the fewer moves you spend, the more points you score. Add one bond too many and you get an atomic overload. Run out of moves and you start over. No rush, no timer — just you, your head and the notebook.

— 200 PRACTICALS, FROM SIMPLE TO IMPOSSIBLE —

200 real compounds, sorted by difficulty and unlocked one at a time. Nothing here is made up: every molecule comes from the PubChem database, with the same bonds and valences it has in the real world.

You'll recognise plenty along the way:
• Water, oxygen, ammonia, carbon dioxide
• Methane, ethanol, acetone, acetic acid
• Benzene, toluene, phenol, naphthalene, glycerol
• Glycine, alanine, cysteine and other amino acids
• Vanillin, citric acid, nicotinamide
• Aspirin, paracetamol, caffeine

By the time you solve the last one, you'll be able to draw half a dozen molecules from memory that used to be nothing but names.

— A GAME WITH CHARACTER —

Squared paper, blue ink, ballpoint strokes. MOLECULA doesn't look like a chemistry app: it looks like the notebook of the student who got bored in class and started drawing in the margins. Every detail is hand-tuned, in both light and dark mode.

• Score and personal best on every practical
• Progress saved automatically
• Shareable result card for your solutions
• Two minutes of instructions and you're playing
• Available in English, Spanish, French, German, Italian and Portuguese

— GENUINELY CLEAN —

No ads. No in-app purchases. No sign-up. No accounts. No permissions. No internet connection: it runs fully offline, on the underground, on a plane or in the middle of nowhere.

We collect nothing about you, because the app doesn't even have the means to send it. Your progress lives on your phone and nowhere else.

— WHO IS IT FOR? —

For anyone who enjoys a well-made puzzle, even if they haven't touched chemistry since school: no prior knowledge needed, the rules take two pages to explain and you pick up the rest by playing.

For high school and first-year university students who want valences and structures to stick without opening a textbook.

For teachers looking for five minutes of class that feel different.

And for anyone who loves that feeling of staring at a screen, not seeing the answer, staring a bit longer… and then suddenly seeing it.

Download MOLECULA and build your first molecule in under a minute.

What’s new

• Fixed several issues that could show up while working through a practical.
• Small tweaks so the notebook runs smoother from cover to cover.